New section for contributed documentation. Added contributed code item.
Added howto contribution from D.Malvestiti
+ when -t=0 outputs the eventual avearge traverse time of the orders delivbered at the time of the current log
+ FIXED: now the code actually calculates a proper time window
+ Added '-t' or ''--traverseTimeWindow' param to tune the time window for traverse time of orders. default =0, the average il calculated over the total sim time span as before.
+ FIX: bug in simulator main loop. When saving monitors a not existent method was called
+ updated schedule_alternative.json config file in "recipes" format subobject
+ fixed typo in parsers.py